diff --git a/src/main/java/com/qiniu/storage/Region.java b/src/main/java/com/qiniu/storage/Region.java
index 8765c868c..4d93959cc 100644
--- a/src/main/java/com/qiniu/storage/Region.java
+++ b/src/main/java/com/qiniu/storage/Region.java
@@ -371,7 +371,7 @@ String getApiHost(RegionReqInfo regionReqInfo) throws QiniuException {
     }
 
     String getUcHost(RegionReqInfo regionReqInfo) throws QiniuException {
-        if (ucHosts == null || ucHosts.size() == 0) {
+        if (ucHosts == null || ucHosts.isEmpty()) {
             return "";
         }
         return ucHosts.get(0);
@@ -470,6 +470,13 @@ public Builder apiHost(String apiHost) {
             return this;
         }
 
+        public Builder ucHost(String... ucHosts) {
+            if (ucHosts.length > 0) {
+                this.region.ucHosts = Arrays.asList(ucHosts);
+            }
+            return this;
+        }
+
         /**
          * 自动选择,其它参数设置无效
          *